]> git.baikalelectronics.ru Git - kernel.git/commit
dccp: fix info leak via getsockopt(DCCP_SOCKOPT_CCID_TX_INFO)
authorMathias Krause <minipli@googlemail.com>
Wed, 15 Aug 2012 11:31:55 +0000 (11:31 +0000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 16 Aug 2012 04:36:31 +0000 (21:36 -0700)
commit68ef4adf34960287479c4d7c68a4114b8317856b
tree39298c02797359bcc83a7d552fe26fedb1ad665c
parente138214bc50f4b55660afa19141a5349f36114cd
dccp: fix info leak via getsockopt(DCCP_SOCKOPT_CCID_TX_INFO)

The CCID3 code fails to initialize the trailing padding bytes of struct
tfrc_tx_info added for alignment on 64 bit architectures. It that for
potentially leaks four bytes kernel stack via the getsockopt() syscall.
Add an explicit memset(0) before filling the structure to avoid the
info leak.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/dccp/ccids/ccid3.c